Alright, have a bit of an odd issue here that I am also seeing on other sites
http://forums.androidcentral.com/samsung-galaxy-s6/513933-s6-sprint-data-connection-slow-start.html
http://forum.xda-developers.com/sprint-galaxy-s6/help/s6-samsung-apps-facebook-instagram-lag-t3081748
https://community.sprint.com/baw/thread/204564
Like the users there, I am having a very hard time getting my S6 to get data on a few things like the Facebook application while on Sprint's network. On wifi it runs just fine and normal internet browsing doesn't have this issue. I've tried reinstalling the application from scratch, updating profile, factory resets, and none of it fixes it. Is this something isolated that only some like me are suffering from or are there people here seeing the same thing? Right now it is almost making the phone useless out of house/work environments that do have Wifi.